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MCQs

Total Questions : 480 | Page 12 of 48 pages
Question 111. What is a free electron?
  1.    An electron that has been freed from its parent atom
  2.    An electron that costs nothing
  3.    An electron that has no electrical charge
  4.    An electron that has twice the amount of charge of a normal electron
  5.    None of the above
 Discuss Question
Answer: Option A. -> An electron that has been freed from its parent atom
Question 112. To get the Norton current, you have to
  1.    Short the load resistor
  2.    Open the load resistor
  3.    Short the voltage source
  4.    Open the voltage source
  5.    None of the above
 Discuss Question
Answer: Option C. -> Short the voltage source
Question 113. The barrier potential accross each depletion layer is
  1.    0
  2.    0.8 V
  3.    0.7 V
  4.    20 V
  5.    None of the above
 Discuss Question
Answer: Option C. -> 0.7 V
Question 114. Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?
  1.    Flux density
  2.    Number of lines of force
  3.    Magnetomotive force
  4.    Reluctance
  5.    None of the above
 Discuss Question
Answer: Option C. -> Magnetomotive force
Question 115. What kind of battery is most likely included in a cordless electric knife?
  1.    Zinc-carbon battery
  2.    Mercury-cell battery
  3.    Nicad battery
  4.    Lead-acid battery
  5.    None of the above
 Discuss Question
Answer: Option B. -> Mercury-cell battery
Question 116. The basic unit of measurement for resistance is the:
  1.    volt
  2.    ampere
  3.    ohm
  4.    watt
  5.    None of the above
 Discuss Question
Answer: Option C. -> ohm
Question 117. What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?
  1.    0 degree
  2.    26.6 degree
  3.    90 degree
  4.    180 degree
  5.    None of the above
 Discuss Question
Answer: Option B. -> 26.6 degree
Question 118. When operating below its resonant frequency, a series RLC circuit has the characteristics of a:
  1.    series RL circuit
  2.    series RC circuit
  3.    series RLC circuit operated above its resonant frequency
  4.    purely resistive circuit
  5.    None of the above
 Discuss Question
Answer: Option B. -> series RC circuit
Question 119. The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
  1.    Strong
  2.    Neutral
  3.    Weak
  4.    Impossible to say
  5.    None of the above
 Discuss Question
Answer: Option C. -> Weak
Question 120. Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?
  1.    0.3 A
  2.    0.2 A
  3.    0.4 A
  4.    0.6 A
  5.    None of the above
 Discuss Question
Answer: Option B. -> 0.2 A

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